How to Block a Number on Landline Without Call Blocker Devices

Unwanted calls on a landline can be frustrating. Whether it’s telemarketers, scammers, or persistent individuals, receiving constant unwanted calls can be disruptive. While many people use call blocker devices, not everyone wants to buy additional equipment. Fortunately, there are several ways to block numbers on a landline without a call blocker—using simple built-in features, service provider options, and legal protections.

This guide will explain the best methods to block a number on a landline without using extra devices, including vertical service codes, service provider features, and legal registries.

1. Using Vertical Service Codes (VSC) to Block Numbers

Vertical Service Codes (VSCs) are special dialing sequences that activate specific call features on a landline. Most landline providers support these codes, but they may vary by country and telecom provider.

How to Block a Number Using VSC

Pick up your landline phone and listen for a dial tone.
*Dial 60 (or 1160 on rotary phones).
Follow the voice prompts to add numbers to your block list.
To block the last number that called you, dial #01#.
To remove a blocked number, repeat the steps and select the remove option.

Limitations of VSC Call Blocking

This method only works for some providers (Check with your provider first).
Many landline services limit the number of blocked numbers (usually up to 10).
Does not block anonymous or private numbers—only specific ones.

2. Enabling Anonymous Call Rejection (ACR)

Many unwanted calls come from numbers that hide their caller ID. You can block these anonymous calls using Anonymous Call Rejection (ACR).

How to Enable ACR on Your Landline

Pick up your landline and listen for a dial tone.
*Dial 77 to activate Anonymous Call Rejection.
If you want to turn it off, dial ** 87*.

Things to Know About ACR

Blocks only calls with no caller ID. It won’t block spam calls from real phone numbers.
May block important calls (e.g., hospitals, government offices, or private callers).
Some phone companies charge extra for this feature.

3. Contacting Your Landline Provider for Call Blocking Services

Many telephone providers offer call-blocking features that don’t require extra devices. These services are usually available through your provider’s online account dashboard or customer service.

How to Check Your Provider’s Call Blocking Options

Visit your provider’s website and log into your account.
Look for a “Call Blocking” or “Call Features” section.
Activate the call-blocking service and enter the numbers you want to block.
If you can’t find this option, call customer support and ask about available blocking services.

Popular Providers Offering Call Blocking (USA & UK)

AT&T: Call Protect
Verizon: Call Filter
Spectrum: Call Guard
BT (UK): Call Protect
Sky (UK): Talk Shield

Key Limitations of Provider-Based Blocking

Some providers charge extra for advanced call blocking.
The number of blockable contacts is limited (usually up to 30).
Spam robocalls may still get through unless you use provider spam filtering.

4. Registering Your Landline on the National Do Not Call Registry

The National Do Not Call Registry is a free service that helps reduce unwanted telemarketing calls.

How to Register Your Landline on the Do Not Call List

Visit the official Do Not Call website (varies by country).
Enter your landline number and email.
Confirm your registration by following the verification steps.
Wait 31 days for the registration to take effect.

Limitations of the Do Not Call List

Only blocks legitimate telemarketers. Scammers and robocalls still find ways to call.
Does not stop charity or political calls.
Does not block personal calls from unwanted people.

5. Blocking Calls Using Landline Phone Features

Some modern landline phones have built-in call-blocking features that allow you to filter numbers without needing your provider.

How to Check If Your Phone Has Call Blocking

Look for a “Call Block” button on your phone.
Check your phone’s manual (or search online for your model name and “call blocking”).
Use the menu settings to block specific numbers.

Pros and Cons of Phone-Based Blocking

Works without extra services or provider fees.
Can block more numbers than VSC codes.
Only blocks calls when using that phone (not all landline extensions).

6. Avoiding Unwanted Calls by Protecting Your Landline Number

The best way to stop unwanted calls is to prevent telemarketers from getting your number in the first place.

Tips to Protect Your Landline Number

Never share your landline number online (e.g., social media, forms).
Opt out of marketing calls when signing up for services.
Use a secondary number for online forms.
Report spam calls to your phone provider.

7. Reporting Spam and Harassment Calls

If blocking doesn’t work, reporting unwanted calls can help authorities take action against persistent spammers.

Where to Report Spam Calls

In the USA: Report to the Federal Trade Commission (FTC).
In the UK: Report to Ofcom.

Conclusion

Blocking unwanted calls on a landline without call blocker devices is possible using vertical service codes, anonymous call rejection, provider-based features, and government registries. In the U.S., more than 50% of households still use landlines, and reports show that over 58 billion robocalls were made in the last year alone. If standard blocking fails, consider contacting your provider for additional call filtering options or reporting persistent unwanted calls, as statistics indicate that reporting spam calls can reduce them by up to 20%. Staying updated with your telecom provider’s latest call-blocking features is crucial, as companies now introduce AI-powered filters to counteract evolving spam tactics and reduce nuisance calls.

FAQs

1. Can I block a number on my landline without a call blocker device?
Yes, you can use Vertical Service Codes (*60, *77, etc.), contact your phone provider for blocking options, or register on the National Do Not Call Registry to reduce unwanted calls.

2. Does the Do Not Call Registry stop all unwanted calls?
No, the registry primarily blocks telemarketers. It does not prevent robocalls, scam calls, political calls, or calls from charities.

3. What should I do if blocking codes don’t work on my landline?
Check with your service provider, as some telecom companies do not support certain blocking codes. They may offer alternative call-blocking features.

4. Will Anonymous Call Rejection (77) block all spam calls?
No, it only blocks calls without caller ID. Scammers using real phone numbers can still reach you.

5. How can I report unwanted landline calls?
In the U.S., report spam calls to the Federal Trade Commission (FTC). In the UK, report them to Ofcom.